112 lines
3.4 KiB
C#
112 lines
3.4 KiB
C#
using FastGithub.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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using System;
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using System.Linq;
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using System.Net;
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using System.Net.Http;
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using System.Threading;
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using System.Threading.Tasks;
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namespace FastGithub
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{
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/// <summary>
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/// app后台服务
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/// </summary>
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sealed class AppHostedService : BackgroundService
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{
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private readonly IOptions<FastGithubOptions> options;
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private readonly ILogger<AppHostedService> logger;
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public AppHostedService(
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IOptions<FastGithubOptions> options,
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ILogger<AppHostedService> logger)
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{
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this.options = options;
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this.logger = logger;
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}
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/// <summary>
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/// 启动完成
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/// </summary>
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/// <param name="cancellationToken"></param>
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/// <returns></returns>
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public override Task StartAsync(CancellationToken cancellationToken)
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{
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var version = ProductionVersion.Current;
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this.logger.LogInformation($"{nameof(FastGithub)}启动完成，当前版本为v{version}，访问 https://github.com/dotnetcore/fastgithub 关注新版本");
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return base.StartAsync(cancellationToken);
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}
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/// <summary>
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/// 后台任务
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/// </summary>
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/// <param name="stoppingToken"></param>
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/// <returns></returns>
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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if (OperatingSystem.IsWindows())
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{
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return;
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}
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await Task.Delay(TimeSpan.FromSeconds(1d), stoppingToken);
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if (await this.UseFastGithubProxyAsync() == false)
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{
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var httpProxyPort = this.options.Value.HttpProxyPort;
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this.logger.LogWarning($"请设置系统自动代理为http://{IPAddress.Loopback}:{httpProxyPort}，或手动代理http/https为{IPAddress.Loopback}:{httpProxyPort}");
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}
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}
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/// <summary>
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/// 应用fastgithub代理
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/// </summary>
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/// <param name="proxyServer"></param>
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/// <param name="httpProxyPort"></param>
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/// <returns></returns>
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private async Task<bool> UseFastGithubProxyAsync()
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{
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var systemProxy = HttpClient.DefaultProxy;
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if (systemProxy == null)
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{
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return false;
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}
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var domain = this.options.Value.DomainConfigs.Keys.FirstOrDefault();
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if (domain == null)
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{
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return true;
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}
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var destination = new Uri($"https://{domain.Replace('*', 'a')}");
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var proxyServer = systemProxy.GetProxy(destination);
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if (proxyServer == null)
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{
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return false;
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}
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var httpProxyPort = this.options.Value.HttpProxyPort;
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if (proxyServer.Port != httpProxyPort)
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{
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return false;
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}
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if (IPAddress.TryParse(proxyServer.Host, out var address))
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{
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return address.Equals(IPAddress.Loopback);
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}
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try
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{
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var addresses = await Dns.GetHostAddressesAsync(proxyServer.Host);
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return addresses.Contains(IPAddress.Loopback);
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}
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catch (Exception)
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{
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return false;
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}
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}
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}
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}
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